I'm thinking of replacing the carb in my PS190 1989 since the one I have is automotive. If I buy a new one or remanufactured one that fit my 351, is it just to mount it and off I go or do I have to calibrate and tune it, not to keen on calibrating it.

TMCNo1

08-12-2009, 08:58 AM

I'm thinking of replacing the carb in my PS190 1989 since the one I have is automotive. If I buy a new one or remanufactured one that fit my 351, is it just to mount it and off I go or do I have to calibrate and tune it, not to keen on calibrating it.

All marine are calibrated for marine use. The new one from here, http://www.skidim.com/prodinfo.asp?number=RA052003, is a cheap as they come using the a discount code for 10% off if ordered online. This is the same carb as shown here, PN # 0-80319-1, http://www.holley.com/0-80319-1.asp
All you may have to do is adjust the air/fuel idle mixture screws on each side of the front bowl and adjust the idle speed, other than that it plug-n-play.

You can always try a fresh plug-n-play rebuild or have yours rebuilt for a cheaper price here, http://www.nationalcarburetors.com/marinecarburetorsforless/fourbarrelholley.aspx

hkallestad

08-12-2009, 09:07 AM

Thanks! I found the nationalcarb ones at ebay, might go for one of those.

Commandohorn

08-12-2009, 04:02 PM

I can personally vouch for these folks!!

http://www.guaranteedcarbs.com/

ROB

08-16-2009, 07:54 PM

You will, as TMC has said, have to adjust the air/fuel mix and idle speed. Bring a small flat head screw driver with you on you first trip out. The only way to adjust is to have her on the water under load in gear. I ended up with my 4160, seating the air/fuel screws lightly and turning out 1 1/2 turns and then playing with it from there to find the right performance for my needs. Whatever you do to one side you do to the other.

TMCNo1

08-16-2009, 08:14 PM

Remember, you can set the idle speed at 600rpm in gear at idle to start with, but after setting the air/fuel mixture screws and getting the engine idling smooth in the process, you may still have to re-adjust the idle speed again, as the air/adjustments may alter the idle speed. Then after you have run it a while, check and adjust the idle speed again if need be.

ROB

08-16-2009, 08:28 PM

That's pretty much how it worked for me. After, all of the adjustments, and running at normal operating temp, I had to back-off the idle slightly. It's still a pretty simple project, and the performance gain is awesome.

hkallestad

08-17-2009, 05:28 AM

Ok, so you have to be idling in gear to adjust it? Can't adjust with gear disengaged?

slushpup

08-17-2009, 10:42 PM

Float adjustments are pre set at the factory,Air mixture screws and Idle screw are all you need to adjust.Both easy and simple.in gear tied to the dock woks fine, If not adjust for 800 rpm you should loose 200 rpm in gear.